G: Everyone can see it
PG: Everyone can see it, might want to go with your kids
R: Kids shouldn't see this, but it's up to you
X: Bewbies

Now
G: This is a Disney movie
PG: This is a movie your older kids want to see.
PG-13: This is a movie your older kids want to see and the bare minimum of what would be funny to an adult
R: This movie has action
NC-17: Bewbies
X: Vintage bewbies